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Mate-sampling costs and sexy sons
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
2015 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 28, no 1, 259-266 p.Article in journal (Refereed) Published
Abstract [en]

Costly female mating preferences for purely Fisherian male traits (i.e. sexual ornaments that are genetically uncorrelated with inherent viability) are not expected to persist at equilibrium. The indirect benefit of producing sexy sons' (Fisher process) disappears: in some models, the male trait becomes fixed; in others, a range of male trait values persist, but a larger trait confers no net fitness advantage because it lowers survival. Insufficient indirect selection to counter the direct cost of producing fewer offspring means that preferences are lost. The only well-cited exception assumes biased mutation on male traits. The above findings generally assume constant direct selection against female preferences (i.e. fixed costs). We show that if mate-sampling costs are instead derived based on an explicit account of how females acquire mates, an initially costly mating preference can coevolve with a male trait so that both persist in the presence or absence of biased mutation. Our models predict that empirically detecting selection at equilibrium will be difficult, even if selection was responsible for the location of the current equilibrium. In general, it appears useful to integrate mate sampling theory with models of genetic consequences of mating preferences: being explicit about the process by which individuals select mates can alter equilibria.

Place, publisher, year, edition, pages
2015. Vol. 28, no 1, 259-266 p.
Keyword [en]
costly female choice, fisherian sexual selection, mate sampling
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-247325DOI: 10.1111/jeb.12532ISI: 000348992900022PubMedID: 25399634OAI: oai:DiVA.org:uu-247325DiVA: diva2:797058
Available from: 2015-03-22 Created: 2015-03-17 Last updated: 2017-12-04Bibliographically approved

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